<template>
 <div id="root">
    <div class="todo-container">
      <div class="todo-wrap">
        <!-- <Top :addTodo="addTodo" /> -->
        <Top @addTodo="addTodo"/>
        <List :todos="todos" />
        <Abcfooter :todos="todos" @checkAllTodo = "checkAllTodo" @clearAllTodo ="clearAllTodo"/>
    	</div>
    </div>
  </div>
</template>

<script>
import Top from './components/Top.vue'
import List from './components/List.vue'
import Abcfooter from './components/abcfooter.vue'
export default {
  name:'App',
  components:{
    Abcfooter,
    Top,
    List,
},
      data() {
      return {
         todos:[
            {id:'001',title:"吃饭",done:true},
            {id:'002',title:"睡觉",done:true},
            {id:'003',title:"喝酒",done:true},
            {id:'004',title:"烫头",done:true},
         ]
      }
    },
    methods: {
      //添加一个todo
      addTodo(todoObj)
      {
       this.todos.unshift(todoObj)
      },
      //取消勾选一个todu
      checkTodo(id){
       this.todos.forEach((todo)=>{
         if(todo.id === id)
         {
          todo.done = !todo.done
         }
       })
      },
      //删除一个todo
      deleteTodo(id)
      {
        this.todos = this.todos.filter((todo)=>{
          return todo.id !== id
        })
      },
      //全选or全不选
      checkAllTodo(done)
      {
        this.todos.forEach((todo)=>{
          todo.done = done
        })
      },

      // 清除所有已经完成的todo
      clearAllTodo()
      {
        this.todos = this.todos.filter = ((todo)=>{
          return !todo.done
        })
      },
      //跟新一个Todo
      updateTodo(id,title)
      {
        this.todos.forEach((todo)=>{
         if(todo.id === id) todo.title = title
        })
      },
    },
    mounted()
    {
      this.$bus.$on('checkTodo',this.checkTodo)
      this.$bus.$on('updateTodo',this.updateTodo)
      this.$bus.$on('deleteTodo',this.deleteTodo)

    },
    beforeDestroy()
    {
       this.$bus.$off('checkTodo')
       this.$bus.$off('deleteTodo')
       this.$bus.$off('updateTodo')
    }
}
</script>

<style scoped>
  /*base*/
  body {background: #fff;}
  .btn {display: inline-block;padding: 4px 12px;margin-bottom: 0;font-size: 14px;
    line-height: 20px;text-align: center;vertical-align: middle;cursor: pointer;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
    border-radius: 4px;}
  .btn-danger {color: #fff;background-color: #da4f49;border: 1px solid #bd362f;}
  .btn-edit{
    color: #fff;
    background-color: skyblue;
    border: 1px solid skyblue;
    margin-right: 5px;
  }
  .btn-danger:hover {color: #fff;background-color: #bd362f;}
  .btn:focus {outline: none;}
  .todo-container {width: 600px;margin: 0 auto;}
  .todo-container .todo-wrap {padding: 10px;border: 1px solid #ddd;border-radius: 5px;}
</style>